sylveos

commit c90d029d219b3e17ee7ed3e79600f553caed4dbe
parent bacc3f8d1d2493eca6006d33c8e8ded9f5be35bf
Author: Sylvia Ivory <git@sivory.net>
Date:   Tue,  3 Mar 2026 19:13:11 -0800

Improve comments

Diffstat:
M
pi/mmu.zig
 | 
6
+++++-

1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/pi/mmu.zig b/pi/mmu.zig
@@ -456,11 +456,15 @@ pub fn reset() void {
     system.invalidate_TLB();
 
     // B2 ordering
+    // Ensure maintenance completes
     mem.barrier(.Write);
 
+    // Flush BTB as part of reset
     system.flush_btb();
 
+    // Ensure completion
     mem.barrier(.Write);
+    // Required after BTB flush
     mem.barrier(.Instruction);
 }
 
@@ -494,7 +498,7 @@ pub noinline fn enable() void {
 
     // Ensure completion of enabling
     mem.barrier(.Write);
-    mem.barrier(.Instruction);
+
     // Required after enabling MMU
     system.flush_btb();
     // Required after BTB flush